Can my Tortoise eat Mango?

I have a forest hingeback tortoise. She loves banana and boiled egg. When we bought her, the people told us she would like melon, as she is closely related to a box turtle. We're supposed to make sure she gets her greens (although she's like a 6 year old when it comes to that!) ... anyway, is it safe for her to have mango? Wasn't sure about "exotic" stuff. Thanks!